package com.example.forum.controller;

import com.example.forum.common.AppResult;
import com.example.forum.common.ResultCode;
import com.example.forum.config.AppConfig;
import com.example.forum.model.User;
import com.example.forum.services.IUserService;
import com.example.forum.utils.MD5Util;
import com.example.forum.utils.StringUtil;
import com.example.forum.utils.UUIDUtil;
import com.sun.istack.internal.NotNull;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

//对controller进行说明
@Api(tags = "用户接口")
// 日志注解
@Slf4j
// 这是一个返回数据的Controller
@RestController
// 设置路由映射 一级路径
@RequestMapping("/user")
public class UserController {
    @Resource
    private IUserService userService;

    /**
     * 用户注册
     *
     * @param username       用户名
     * @param nickname       用户昵称
     * @param password       密码
     * @param passwordRepeat 重复密码
     * @return
     */
    @ApiOperation("用户注册")
    @PostMapping("/register")
    public AppResult register(@ApiParam("用户名") @RequestParam("username") @NotNull String username,
                              @ApiParam("昵称") @RequestParam("nickname") @NotNull String nickname,
                              @ApiParam("密码") @RequestParam("password") @NotNull String password,
                              @ApiParam("确认密码") @RequestParam("passwordRepeat") @NotNull String passwordRepeat) {

        // 校验密码与重复密码是否相同
        if (!password.equals(passwordRepeat)) {
            log.warn(ResultCode.FAILED_TWO_PWD_NOT_SAME.toString());
            // 返回错误信息
            return AppResult.failed(ResultCode.FAILED_TWO_PWD_NOT_SAME);
        }

        // 准备数据
        User user = new User();
        user.setUsername(username);
        user.setNickname(nickname);
        // 处理密码
        // 生成盐
        String salt = UUIDUtil.UUID_32();
        // 生成密码的密文
        String encryptPassword = MD5Util.md5Salt(password, salt);
        // 设置密码和盐
        user.setPassword(encryptPassword);
        user.setSalt(salt);

        // 调用service层
        userService.createNormalUser(user);
        //返回成功

        return AppResult.success();
    }

    /**
     * 用户登录
     *
     * @param username 用户名
     * @param password 密码
     * @return
     */
    @ApiOperation("用户登录")
    @PostMapping("/login")
    public AppResult login(HttpServletRequest request,
                           @ApiParam("用户名") @RequestParam("username") @NotNull String username,
                           @ApiParam("密码") @RequestParam("password") @NotNull String password) {
        // 调用Service中的登录方法,返回User对象
        User user = userService.login(username, password);
        if (user == null) {
            log.warn(ResultCode.FAILED_LOGIN.toString());
            return AppResult.failed(ResultCode.FAILED_LOGIN);
        }
        // 如果登陆成功把User对象设置到Session作用域中
        HttpSession session = request.getSession(true);
        session.setAttribute(AppConfig.USER_SESSION, user);
        // 返回结果
        return AppResult.success();
    }

    @ApiOperation("获取用户信息")
    @GetMapping("/info")
    public AppResult<User> getUserInfo(HttpServletRequest request,
                                       @ApiParam("用户ID") @RequestParam(value = "id", required = false) @NotNull Long id) {
        // 定义返回的User对象
        User user = null;
        // 根据Id的值判断User对象的获取方式
        if (id == null) {
            // 1. 如果id为空，从session中获取当前登录的用户信息
            HttpSession session = request.getSession(false);
            // 从session中获取当前登录的用户信息
            user = (User) session.getAttribute(AppConfig.USER_SESSION);
        } else {
            // 2. 如果id不为空，从数据库中按Id查询出用户信息
            user = userService.selectById(id);
        }
        // 判断用户对象是否为空
        if (user == null) {
            return AppResult.failed(ResultCode.FAILED_USER_NOT_EXISTS);
        }
        // 返回正常的结果
        return AppResult.success(user);
    }


    @ApiOperation("退出登录")
    @GetMapping("/logout")
    public AppResult logout(HttpServletRequest request) {
        // 获取session对象
        HttpSession session = request.getSession(false);
        // 判断session是否存在
        if (session != null) {
            log.info("退出成功");
            // 用户在登录状态,直接销毁session
            session.invalidate();
        }
        return AppResult.success("退出成功");
    }

    /**
     * 修改个人信息
     *
     * @param username 用户名
     * @param nickname 昵称
     * @param gender   性别
     * @param email    邮箱
     * @param phoneNum 电话
     * @param remark   个人简介
     * @return
     */
    @ApiOperation("修改个人信息")
    @PostMapping("/modifyInfo")
    public AppResult modifyInfo(HttpServletRequest request,
                                @ApiParam("用户名") @RequestParam(value = "username", required = false) String username,
                                @ApiParam("昵称") @RequestParam(value = "nickname", required = false) String nickname,
                                @ApiParam("性别") @RequestParam(value = "gender", required = false) Byte gender,
                                @ApiParam("邮箱") @RequestParam(value = "email", required = false) String email,
                                @ApiParam("电话") @RequestParam(value = "phoneNum", required = false) String phoneNum,
                                @ApiParam("个人简介") @RequestParam(value = "remark", required = false) String remark) {

        if (StringUtil.isEmpty(username) && StringUtil.isEmpty(nickname) &&
                StringUtil.isEmpty(email) && StringUtil.isEmpty(phoneNum) &&
                StringUtil.isEmpty(remark) && gender == null) {
            return AppResult.failed("请输入要修改的内容");
        }
        HttpSession session=request.getSession(false);
        User user= (User) session.getAttribute(AppConfig.USER_SESSION);
        User updateUser=new User();
        updateUser.setId(user.getId());
        updateUser.setUsername(username);
        updateUser.setNickname(nickname);
        updateUser.setGender(gender);
        updateUser.setEmail(email);
        updateUser.setPhoneNum(phoneNum);
        updateUser.setRemark(remark);

        userService.modifyInfo(updateUser);
        user = userService.selectById(user.getId());
        // 把最新的用户信息设置到session中
        session.setAttribute(AppConfig.USER_SESSION, user);
        return AppResult.success(user);
    }
    @ApiOperation("修改密码")
    @PostMapping("/modifyPwd")
    public AppResult modifyPassword(HttpServletRequest request,
            @ApiParam("老密码") @RequestParam("oldPassword") @NotNull  String oldPassword,
            @ApiParam("新密码") @RequestParam("newPassword") @NotNull  String newPassword,
            @ApiParam("重复密码") @RequestParam("passwordRepeat") @NotNull  String passwordRepeat){

        if (!newPassword.equals(passwordRepeat)){
            return AppResult.failed(ResultCode.FAILED_TWO_PWD_NOT_SAME);
        }
        HttpSession session = request.getSession(false);
        User user=(User) session.getAttribute(AppConfig.USER_SESSION);
        userService.modifyPassword(user.getId(),newPassword,oldPassword);
        return AppResult.success();
    }
}
